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master 5e1a8d5: Fix the unexec build on GNU/Linux
From: |
Eli Zaretskii |
Subject: |
master 5e1a8d5: Fix the unexec build on GNU/Linux |
Date: |
Wed, 19 May 2021 10:45:23 -0400 (EDT) |
branch: master
commit 5e1a8d5654d97d2631ad67ebb88be4d2eec7d408
Author: Eli Zaretskii <eliz@gnu.org>
Commit: Eli Zaretskii <eliz@gnu.org>
Fix the unexec build on GNU/Linux
The unexec build on GNU/Linux must use HYBRID_MALLOC (gmalloc.c) and
sheap.c. This was inadvertently disabled because a configure-time
test for 'sbrk' was moved as side effect of an unrelated change.
* configure.ac: Test for 'sbrk' before using the result in the
decision about SYSTEM_MALLOC and HYBRID_MALLOC.
(HYBRID_MALLOC): Prevent Gnulib from redirecting 'free' to its
replacement 'rpl_free'.
* lib/Makefile.in (not_emacs_OBJECTS): Add mallooc/%.o and free.o.
---
configure.ac | 8 +++++++-
lib/Makefile.in | 4 +++-
2 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/configure.ac b/configure.ac
index 3df4359..d35ac6d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2273,6 +2273,9 @@ doug_lea_malloc=$emacs_cv_var_doug_lea_malloc
hybrid_malloc=
system_malloc=yes
+dnl This must be before the test of $ac_cv_func_sbrk below.
+AC_CHECK_FUNCS_ONCE([sbrk])
+
test $with_unexec = yes &&
case "$opsys" in
## darwin ld insists on the use of malloc routines in the System framework.
@@ -2306,6 +2309,9 @@ elif test "$hybrid_malloc" = yes; then
GNU_MALLOC_reason=" (only before dumping)"
GMALLOC_OBJ=gmalloc.o
VMLIMIT_OBJ=
+ # FIXME: This is to prevent Gnulib from redirecting 'free' to its
+ # replacement, instead of 'hybrid_free' in gmalloc.c.
+ gl_cv_func_free_preserves_errno=yes
else
test "$doug_lea_malloc" != "yes" && GMALLOC_OBJ=gmalloc.o
VMLIMIT_OBJ=vm-limit.o
@@ -4677,7 +4683,7 @@ AC_CHECK_HEADERS(valgrind/valgrind.h)
AC_CHECK_MEMBERS([struct unipair.unicode], [], [], [[#include <linux/kd.h>]])
-AC_CHECK_FUNCS_ONCE([__lsan_ignore_object sbrk])
+AC_CHECK_FUNCS_ONCE([__lsan_ignore_object])
AC_FUNC_FORK
diff --git a/lib/Makefile.in b/lib/Makefile.in
index 6c7a443..ec92f92 100644
--- a/lib/Makefile.in
+++ b/lib/Makefile.in
@@ -69,7 +69,9 @@ Makefile: ../config.status $(srcdir)/Makefile.in
# Object modules that need not be built for Emacs.
# Emacs does not need e-regex.o (it has its own regex-emacs.c),
# and building it would just waste time.
-not_emacs_OBJECTS = regex.o
+# Emacs also doesn't need the dynarray-related files in malloc/ and
+# the replacement 'free'.
+not_emacs_OBJECTS = regex.o malloc/%.o free.o
libgnu_a_OBJECTS = fingerprint.o $(gl_LIBOBJS) \
$(patsubst %.c,%.o,$(filter %.c,$(libgnu_a_SOURCES)))
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